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Telemark (help·info) is a county in Norway, bordering Vestfold, Buskerud, Hordaland, Rogaland and Aust-Agder. Until 1919 the county was known as Bratsberg amt. The county is located in southeastern Norway, extending from Hardangervidda to the Skagerrak coast. The coastline extends from Langesundsfjorden to Gjernestangen at the border to Aust-Agder. Telemark has a very broken and heterogeneous landscape, including many hills and valleys.